• Version? 41.78.16
• Singleplayer/Multiplayer? any
• Host or dedicated? host
• Mods? none
• Old or new save? old (any?)
• Reproduction steps:
1. Place the generator next to the north side of a Big Wired Fence.
2. Stand on the adjacent tile so that the Big Wired Fence is located between you and generator.
3. Pick up the generator.
I've only tested the North/South world-generated fence scenarios and the other way aroud works fine (generator is not accessable from north).
Video: